Thanks Goose. Got it done now. Just to note that my first cam shot is very slightly unoptimized (about 1/6th of a second). This brings me to Gragz, however.
By deliberately having my first cam shot unoptimized, I'm able to manipulate a second Klobb guard right in my path on the way to the second cam. I now have two grenades. As you suggested Graham, I was planning to use it for the cam inside the satelitte, saving me having to enter the building at all. But, if I can find a way to put it through the trees and wipe out the third cam, I think that will save more time.
I'm feeling a lot better about this one now. Hopefully, I'll be done in a couple hours now, and the time will break 1:20 for sure. Thanks for the input.